[libcxx-commits] [libcxx] [libcxx] Implementing hazard ptrs P2530 (PR #218218)

[Hristo Hristov via libcxx-commits]

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Zingam wrote:

```suggestion
// This controls the availability of the C++26 <hazard_pointer> facility. The hazard pointer
// domain (records, retired lists, reclamation) lives in the built library.
#define _LIBCPP_AVAILABILITY_HAS_HAZARD_POINTER _LIBCPP_INTRODUCED_IN_LLVM_24
#define _LIBCPP_AVAILABILITY_HAZARD_POINTER _LIBCPP_INTRODUCED_IN_LLVM_24_ATTRIBUTE

```

Target LLVM24 and moved up.

https://github.com/llvm/llvm-project/pull/218218